Ingredients
Method
For the cake:
- Preheat oven to 350 degrees.
- Coat a 9-inch springform pan with butter. Line the bottom with parchment paper and coat the paper as well.
- In a bowl or on a sheet of wax paper, lightly whisk together the flour, cornstarch, cinnnamon, and vanilla powder (if using) and set aside.
- Separate the eggs, placing the egg whites in a large mixing bowl and the yolks in a medium to large bowl.
- Whisk the egg yolks with the vanilla. Whisk in half the sugar and continue to beat by hand until lightened in color and creamy, about 5 minutes.
- Using an electric mixer on medium-high speed, beat the egg whites with the salt until they hold soft peaks, about 45 to 60 seconds. Increase speed to high and add the remaining sugar in a slow stream, beating until the egg whites hold firm peaks, another 1 to 2 minutes.
- Fold the yolk mixture into the whites with a spatula. Sprinkle 1/3 of the flour mixture over the egg mixture, folding in gradually until just combined. Repeat two more times until all the flour is just incorporated. Be careful not to overmix.
- Pour the batter into the prepared pan and smooth the top. Bake at 350 degrees about 20 minutes, until golden brown and a skewer or toothpick inserted in the center comes out dry.
- Remove from oven and let rest about 5 minutes. Using pot holders, loosen the sides of the pan. Gently invert the cake on a plate, remove the parchment paper, and place the cake right side up on a cooling rack.
- If not using the same day, wrap tightly when completely cool. Freeze if not using within a day or two.
For the syrup and filling:
- Bring strawberry preserves and water to a gentle boil, and cook stirring occasionally, 10 mintues. Remove from heat. Let cool slightly and stir in the rum.
- In a large bowl, use an electric mixer on high speed to combine all the filling ingredients until light and mostly smooth, 2 to 3 minutes. Cover and refrigerate if not using right away.
To assemble the cake:
- Slice the sponge cake into 3 horizontal layers. Place one layer on a serving plate and brush the top with about 1/3 of the strawberry-rum syrup. Spread with 1/3 of the ricotta filling. Continue with the remaining layers (place the top layer cut side up to make it more even and better able to absorb the syrup). Cover and chill for at least 5 hours or up to 24 hours.
- About 15 minutes before serving, set the cake out at room temperature. Combine the sliced berries with sugar and liqueur or juice and let stand for about 10 minutes. Mound or arrange the slices in a pattern on top of the cake, reserving any berries that won’t fit to garnish each serving.
- Cover and refrigerate any leftovers.
Notes
The texture of mascarpone can vary significantly by brand. For recipes like this, I prefer the thicker texture of a brand like BelGioioso. The texture is closer to that of tub cream cheese than that of crème fraiche or sour cream. Creamier versions will make the filling a little softer, but it should firm up upon chilling.